12155222310577 has 2 divisors, whose sum is σ = 12155222310578. Its totient is φ = 12155222310576.

The previous prime is 12155222310457. The next prime is 12155222310587. The reversal of 12155222310577 is 77501322255121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12154399251856 + 823058721 = 3486316^2 + 28689^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155222310577 - 2¹¹ = 12155222308529 is a prime.

It is not a weakly prime, because it can be changed into another prime (12155222310587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077611155288 + 6077611155289.

It is an arithmetic number, because the mean of its divisors is an integer number (6077611155289).

Almost surely, 2^{12155222310577} is an apocalyptic number.

It is an amenable number.

12155222310577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155222310577 is an equidigital number, since it uses as much as digits as its factorization.

12155222310577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294000, while the sum is 43.

Adding to 12155222310577 its reverse (77501322255121), we get a palindrome (89656544565698).

The spelling of 12155222310577 in words is "twelve trillion, one hundred fifty-five billion, two hundred twenty-two million, three hundred ten thousand, five hundred seventy-seven".